RT7271A
Ordering Information
RT7271A
Marking Information
17 : Product Code
W : Date Code
17W
Package Type
WSC : WL-CSP-12B 1.65x1.95 (BSC)
Note :
Richtek products are :
ꢀRoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
ꢀSuitable for use in SnPb or Pb-free soldering processes.
Functional Pin Description
Pin No.
A1, A2, A3
B1
Pin Name
Pin Function
Switch Node. Connect this pin to the external inductor.
Power Input. Connect two 10μF or larger ceramic capacitors to this pin.
Power Ground.
LX
VIN
B2, B3
GND
Compensation Node. Connect external compensation elements to this pin to
stabilize the control loop.
C1
C2
C3
D1
COMP
PGOOD
BOOT
FB
Power Good Indicator Output. Asserts low if output voltage is low due to OTP,
UVP, UVLO, OVP, EN shutdown or during soft-start.
Bootstrap Supply for the High Side MOSFET. Connect a capacitor between this
pin and LX pin.
Feedback Voltage Input. This pin receives the feedback voltage from a resistive
divider connected across the output.
Enable Control Input. Connecting this pin to ground forces the device into
shutdown mode. Pulling this pin over 1.4V enables the device.
D2
D3
EN
AGND
Analog Ground.
Copyright 2013 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
2
DS7271A-00 February 2013
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
